JP6804582B2 - Tatami mat surface material and rimless tatami mat using it - Google Patents

Description

The present disclosure relates to tatami mat surface materials and rimless tatami mats using the same.

When manufacturing a thin rimless tatami mat or the like that requires cushioning on the surface, the productivity in the tatami mat making process is improved by adhering the tatami mat surface and the backing material in advance. When, for example, a water-based adhesive is used to bond the backing material, a drying step is required. Therefore, it is known to use a hot melt adhesive to simplify the step (for example, Patent Documents 1 and 2). reference).

Japanese Unexamined Patent Publication No. 2000-54599 Japanese Unexamined Patent Publication No. 2000-136617

By the way, in the tatami mat making process, the part that is bent perpendicularly to the weft direction has a strong tatami mat surface. Then, when the thermoplastic hot-melt adhesive of Patent Document 1 is used as the adhesive, the adhesive melts in a high temperature environment, and the chewy tatami mat surface peels off from the backing material on the side surface and / or the back surface of the tatami mat. There was a problem that it would end up.

Further, there is a problem that the cost increases when the reactive hot melt adhesive of Patent Document 2 having heat resistance is applied to the entire surface of the tatami mat surface.

Therefore, in the present disclosure, a tatami mat surface material that can suppress the cost increase while suppressing the peeling of the tatami front surface and the backing material on the side surface and / or the back surface of the tatami mat even in a high temperature environment and the rimless using the tatami mat surface material. The challenge is to provide tatami mats.

In order to solve the above problems, the tatami mat surface material according to the first technique disclosed here includes a tatami mat surface made by weaving a fine fiber yarn in which Japanese paper is twisted in a paper twist shape, and an adhesive on the back surface of the tatami mat surface. The adhesive arranged at both ends in the weft direction is a reactive hot melt adhesive, and the adhesive placed at the center in the weft direction is thermoplastic. It is characterized by being a hot melt adhesive.

According to this configuration, by using a reactive hot melt adhesive as the adhesive placed at both ends of the tatami mat surface in the weft direction, it is possible to suppress peeling of the tatami mat surface from the backing material even in a high temperature environment. On the other hand, by using a thermoplastic hot-melt adhesive as the adhesive placed in the central portion of the tatami mat surface in the weft direction, the cost is higher than, for example, a configuration in which the reactive hot-melt adhesive is placed over the entire back surface of the tatami mat surface. Can be suppressed.

In the second technique, in the first technique, the adhesive is arranged over the entire back surface of the tatami mat surface, and the boundary portion between both end portions in the weft direction and the central portion in the weft direction is the reaction. It is characterized in that the property hot melt adhesive and the thermoplastic hot melt adhesive are laminated.

Adhesiveness can be improved by laminating both hot melt adhesives at the boundary portion and suppressing the formation of the uncoated portion.

The third technique is characterized in that, in the second technique, the reactive hot melt adhesive at the boundary portion is arranged on the backing material side with respect to the thermoplastic hot melt adhesive.

By arranging the reactive hot melt adhesive on the backing material side, the adhesiveness and strength can be improved.

The fourth technique is characterized in that, in the second or third technique, the width of the boundary portion in the weft direction is 3 mm or more and 20 mm or less.

By setting the width of the boundary portion within the above range, the adhesiveness and strength can be improved.

In any one of the first to fourth techniques, the fifth technique is that when the tatami mat is made as a rimless tatami mat by sticking it on a tatami floor, both ends in the weft direction are relative to the weft direction. It is characterized in that it is bent vertically to form at least one of the side surface and the back surface of the rimless tatami mat.

According to this configuration, by arranging the reactive hot melt adhesive on the bent portions at both ends in the weft direction where the tatami mat surface is strong, the tatami mat surface and the backing material can be formed on the side surface and / or the back surface of the tatami mat even in a high temperature environment. It is possible to provide a tatami mat surface material that can suppress high cost while suppressing peeling.

The sixth technique is characterized in that, in any one of the first to fifth techniques, the paper-making yarn is a tubular paper-making yarn.

According to this configuration, the tatami mat surface can be made lighter, so that the tatami mat surface material can be made lighter.

The rimless tatami mat according to the seventh technique disclosed herein includes the tatami mat surface material according to any one of the first to sixth techniques and an additional adhesive on the backing material side of the tatami mat surface material. It is characterized by having a tatami floor attached to it.

According to this configuration, it is possible to provide a rimless tatami mat that can suppress high cost while suppressing peeling of the tatami front surface and the backing material on the side surface and / or the back surface of the tatami mat even in a high temperature environment. it can.

In the eighth technique, in the seventh technique, the outer portions of the both ends in the weft direction of the tatami mat surface material are arranged on the side surface of the tatami floor, and the inner portions of the both ends in the weft direction of the tatami mat surface material. At least a part of it is arranged on the surface of the tatami floor.

By arranging both ends of the tatami mat surface material, that is, the portions bonded by the reactive hot melt adhesive from the side surface to the surface of the tatami mat floor, the peeling of the tatami mat surface and the backing material in the rimless tatami mat is effectively suppressed. be able to.

The ninth technique is characterized in that, in the eighth technique, the width of the inner portions of both ends in the weft direction in the weft direction is 20 mm or less.

According to this configuration, the width of both ends of the tatami mat surface material, that is, the portion adhered by the reactive hot melt adhesive, which is arranged on the surface of the tatami floor, is set to the above range, thereby forming the rimless tatami mat. The peeling between the tatami mat surface and the backing material can be effectively suppressed.

The tenth technique is that in any one of the seventh to ninth techniques, both ends in the warp direction of the tatami mat surface material are arranged on the side surface of the tatami floor, and the both ends in the warp direction of the tatami mat surface material. Both ends in the weft direction are characterized by being provided with a reactive hot melt adhesive.

Even on the side surface of the rimless tatami mat in the warp direction, the peeling between the tatami mat surface and the backing material in the rimless tatami mat is effectively suppressed by arranging the portions bonded by the reactive hot melt adhesive at both ends in the weft direction. be able to.

The eleventh technique is characterized in that, in the seventh technique, the outer portions of both ends of the tatami mat surface material in the weft direction are arranged on the back surface of the tatami mat floor.

According to this configuration, it is possible to provide a rimless tatami mat that can suppress high cost while suppressing peeling of the tatami mat surface and the backing material on the back surface of the tatami mat even in a high temperature environment.

As described above, according to the present disclosure, by using a reactive hot melt adhesive as the adhesive placed at both ends of the tatami mat surface in the weft direction, it is possible to suppress peeling of the tatami mat surface from the backing material even in a high temperature environment. .. On the other hand, by using a thermoplastic hot-melt adhesive as the adhesive placed in the central portion of the tatami mat surface in the weft direction, the cost is higher than, for example, a configuration in which the reactive hot-melt adhesive is placed over the entire back surface of the tatami mat surface. Can be suppressed.

It is a perspective view of the rimless tatami mat which concerns on one Embodiment. It is sectional drawing in line AA of FIG. It is an enlarged view of the part indicated by reference numeral B of FIG. It is a top view of the tatami mat surface material of FIG. 2 before tatami matting, and shows the state of different coating of the first adhesive by the same hatching as in FIG. FIG. 2 is a view corresponding to FIG. 2 of a borderless tatami mat according to another embodiment. FIG. 5 is an enlarged view of a portion indicated by reference numeral C in FIG. It is a figure corresponding to FIG. 4 of the tatami mat surface material of FIG.

Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. The following description of preferred embodiments is merely exemplary and is not intended to limit the disclosure, its applications or its uses.

(Embodiment 1)
<Borderless tatami mat>
FIG. 1 is a perspective view of a borderless tatami mat 1 according to the first embodiment. FIG. 2 is a cross-sectional view taken along the line AA of FIG. FIG. 3 is an enlarged view of a portion indicated by reference numeral B in FIG. FIG. 4 is a plan view of the tatami mat surface material 11 before tatami mat making, and shows a state in which the first adhesive 13 described later is painted separately by the same hatching as in FIG.

As shown in FIGS. 1 and 2, the rimless tatami mat 1 according to the present embodiment includes a tatami mat surface material 11 and a tatami floor 16 arranged on the back surface of the tatami mat surface material 11. The rimless tatami mat 1 is a laying type tatami mat, and the tatami mat surface material 11 is arranged on the front surface and the side surface of the tatami floor 16, and is not arranged on the back surface of the tatami floor 16. The tatami mat surface material 11 has a tatami mat surface 12 and a backing material 14 attached to the back surface of the tatami mat surface 12.

In this specification, the direction is as shown in FIG. That is, the direction in which the weft yarn of the tatami mat 12 is extended is referred to as the "weft yarn direction", and the direction in which the warp yarn is extended is referred to as the "warp yarn direction". The weft direction and the warp direction are perpendicular to each other. Further, the front side of the rimless tatami mat 1 is referred to as the "front side", and the back side is referred to as the "back side".

≪Tatami table≫
The tatami mat table 12 is woven with twisted yarns such as hemp and cotton as warp yarns and Japanese paper twisted in a paper twist shape as weft yarns. Weft tatami facing 12, Specifically, for example, the wood fibers of softwood mainly, to cut paper and papermaking at a basis weight ^{15g / m 2 ~20g / m 2} ( machine paper making paper) to 20mm~40mm width, center It is a tubular papermaking yarn (papermaking yarn) having a diameter of 0.7 mm to 1.5 mm, which is twisted into a tubular shape with about 5 to 15 turns with a hollow portion. Tatami facing 12, such a tubular抄繊^yarn, obtained by weaving knitting at ^{0.8kg / m 2 ~1.2kg / m 2} . Since the central portion of the tubular drawing yarn is hollow, the tatami mat surface 12 can be made lighter, and the tatami mat surface material 11 and the rimless tatami mat 1 can be made lighter. The weaving method of the tubular yarn is not particularly limited, but may be plain weave or twill weave.

The surface of each tubular fine yarn constituting the tatami mat 12 may be provided with water repellency in order to impart water resistance and stain resistance. As the water repellent having a water repellent function, for example, a crosslinkable polymer having a hydrophobic group (hydrophobic substituent) and a crosslinkable functional group can be used, and further, the water repellent can be the water repellent. A resin agent that binds the polymers contained in the agent may be added. For the hydrophobic group constituting the water repellent, for example, a perfluoroalkyl group or a perfluoroalkylene group can be used, and for the crosslinkable functional group, for example, a hydroxyl group or a carbonyl group can be used. The resin agent added to the water repellent is made of a crosslinkable polymer having a crosslinkable property in the main chain, and for example, acrylic resin, EVA, vinyl acetate resin or urethane resin can be used.

The water repellent may be applied before making it into a tubular shape, that is, a coated paper coated with a water repellent on the surface in advance may be processed into a tubular shape, or after being immersed in the tubular fine fiber yarn by a dipping method or the like. It may be coated.

≪Backing material≫
As shown in FIGS. 3 and 4, the backing material 14 is attached to the back surface of the tatami mat surface 12 via the first adhesive 13. In detail, as shown in FIG. 4, the backing material 14 has the same shape as the tatami mat surface 12 in a plan view, and covers the entire back surface of the tatami mat surface 12, in other words, the entire surface of the backing material 14. It is attached to the entire back surface of the tatami mat surface 12 via the first adhesive 13 arranged in the above direction.

The lining material 14 is for imparting strength, unraveling prevention, cushioning property, etc. to the tatami mat surface material 11. As the backing material 14, for example, one of sheet materials such as non-woven fabric, woven fabric, felt, vinyl chloride sheet, rubber sheet, urethane material, synthetic resin material, resin foam sheet, and resin sheet can be used alone or. One type can be used as a plurality of layers or a plurality of types of layers may be laminated. The thickness of the backing material 14 is not particularly limited, but can be set to be about the same as the thickness of the tatami mat table 12.

≪First adhesive≫
Although details will be described later, two types of hot melt adhesives are used as the first adhesive 13. Specifically, the hot melt adhesive is a reactive hot melt adhesive and a thermoplastic hot melt adhesive.

Examples of the reactive hot melt adhesive include polyurethane-based, polyolefin-based, EVA (ethylene vinyl acetate) -based hot-melt adhesives such as moisture-curable type, two-component curable type, thermosetting type, UV-curable type, and photocurable type. Can be used. The curing mechanism is preferably a moisture curing type from the viewpoint of cost and handleability. Further, as the resin system, a resin system having both flexibility and heat resistance is suitable particularly for a material having flexibility such as a tatami mat, and specifically, for example, a polyurethane system is suitable. Further, the reactive hot melt adhesive may be selected according to the material of the backing material 14. Specifically, for example, when the backing material 14 is polypropylene-based, a moisture-curable polyolefin-based reactive hot-melt adhesive can be selected.

Examples of the thermoplastic hot melt adhesive include EVA (ethylene vinyl acetate) type, rubber type, polyolefin type, polyamide type, polyester type and the like, and are appropriately selected depending on the type of backing material 14, required performance and the like. For example, when a certain degree of heat resistance is required and the backing material 14 is polypropylene-based, a polyolefin-based hot melt adhesive is selected.

It is desirable that the coating amount of the first adhesive 13 is 20 g / m ² or more and 200 g / m ² or less. If the coating amount is less than 20 g / m ² , the required adhesiveness may not be obtained. If the coating amount is more than 200 g / m ² , the first adhesive 13 that has penetrated from the back surface of the tatami mat 12 to the inside of the tatami mat 12 will squeeze out from between the tubular paper fibers to the surface of the tatami mat 12. There is a risk.

≪Tatami floor≫
The tatami floor 16 is attached to the back surface of the tatami mat surface material 11, that is, the surface on the backing material 14 side via a second adhesive 15 (additional adhesive).

As the tatami floor 16, for example, a tatami board 16A composed of a rectangular plate-shaped insulation board such as a square (half tatami mat) or a rectangle (one tatami mat), plywood, fiberboard, resin plate, or the like is used. In this embodiment, in order to improve the cushioning property of the rimless tatami mat 1, a tatami floor 16 in which a cushioning material 16B such as a expanded polystyrene sheet is integrally provided on the tatami board 16A is used. ing. The tatami floor 16 may be configured without the cushion material 16B.

≪Second adhesive≫
The second adhesive 15 is not particularly limited as long as it can bond the backing material 14 and the tatami floor 16, but since it adheres the elastic backing material 14, it is preferable that the second adhesive 15 has some flexibility, for example, urethane. Adhesives such as based and rubber are suitable.

≪Separate application of the first adhesive≫
Here, the tatami mat surface material 11 according to the present embodiment is characterized in that two types of hot melt adhesives are separately applied as the first adhesive 13 depending on the portion.

As shown in FIG. 4, the tatami mat surface material 11 has a substantially rectangular shape with four corners cut off when unfolded. In the tatami-making process, that is, in the process of attaching the tatami mat surface material 11 to the tatami floor 16 to manufacture the rimless tatami mat 1, both ends 111 of the tatami mat surface material 11 in the weft direction are bent by a bending line 11A perpendicular to the weft direction. It forms the side surface of the rimless tatami mat 1. Specifically, the outer portions 111A of both end portions 111 in the weft direction are arranged on the side surfaces of the tatami floor 16 to form the side surfaces on both sides of the rimless tatami mat 1 in the weft direction. On the other hand, a part of the inner portion 111B of both ends 111 in the weft direction, that is, the central portion in the warp direction is arranged on the surface of the tatami floor 16 to form the end of the surface of the rimless tatami mat 1.

Then, as shown in FIGS. 3 and 4, a reactive hot melt adhesive 13A is arranged as the first adhesive 13 at both end portions 111 in the weft direction. On the other hand, a thermoplastic hot melt adhesive 13B is arranged as the first adhesive 13 in the central portion 113 in the weft direction.

Since both ends of the tatami mat surface material 11 in the weft direction are stiff on the tatami mat surface 12, for example, if a thermoplastic hot melt adhesive is used as the first adhesive 13, it can be used in a high temperature environment in the tatami mat making process, the transportation process at the time of shipment, and the like. When placed, the tatami mat surface 12 can be peeled from the backing material 14 on the side surface of the rimless tatami mat 1 which is bent perpendicular to the weft direction. By using the reactive hot melt adhesive 13A as the first adhesive 13 arranged at both ends 111 in the weft direction of the tatami mat surface material 11, peeling of the tatami mat surface 12 from the backing material 14 can be suppressed even in a high temperature environment. On the other hand, by using the thermoplastic hot melt adhesive 13B as the first adhesive 13 arranged at the central portion 113 in the weft direction of the tatami mat table 12, for example, the reactive hot melt adhesive 13A is arranged over the entire back surface of the tatami mat table 12. It is possible to suppress the high cost as compared with the configuration.

It should be noted that the boundary portion 115 between both end portions 111 in the weft direction and the central portion 113 in the weft direction suppresses the formation of an uncoated portion of the first adhesive 13 to ensure sufficient adhesiveness between the tatami mat surface 12 and the backing material 14. From this point of view, the reactive hot melt adhesive 13A and the thermoplastic hot melt adhesive 13B are laminated. The first adhesive 13 arranged on the boundary portion 115 is conveniently referred to as a boundary portion adhesive 13C.

The boundary partial adhesive 13C has a laminated structure in which the reactive hot melt adhesive 13A is arranged on the backing material 14 side of the thermoplastic hot melt adhesive 13B. This makes it possible to secure higher adhesiveness between the tatami mat surface 12 and the backing material 14 and higher strength of the tatami mat surface material 11. The stacking order of the boundary partial adhesive 13C is not particularly limited, and the reactive hot melt adhesive 13A may be arranged closer to the tatami mat surface 12 than the thermoplastic hot melt adhesive 13B. Further, the amount of the boundary portion adhesive 13C applied is such that the total amount of the reactive hot melt adhesive 13A and the thermoplastic hot melt adhesive 13B applied to the boundary portion is the above-mentioned first adhesive 13. It should be within the numerical range of the coating amount.

The width W1 of the boundary portion 115 in the weft direction can be 3 mm or more and 20 mm or less, preferably 5 mm or more and 15 mm or less. If the width is less than 3 mm, an uncoated portion of the first adhesive 13 may occur due to an error during coating. If the width exceeds 20 mm, the area of the portion where the reactive hot melt adhesive is used is too wide, which may lead to high cost.

The width W2 in the weft direction of the inner portion 111B of both end portions 111 in the weft direction can be 20 mm or less, preferably 5 mm or more and 15 mm or less. The peeling between the tatami mat surface 12 and the backing material 14 can be suppressed without providing the inner portion 111B arranged on the surface of the rimless tatami mat 1, but by providing the inner portion 111B, the position of the bending line 11A is included. Since the reactive hot melt adhesive 13A is arranged from the side surface to the surface of the rimless tatami mat 1, peeling can be suppressed more effectively. If the width of the inner portion 111B in the weft direction is more than 20 mm, it may lead to high cost. Further, it is desirable that the reactive hot melt adhesive 13A is arranged on the entire surface of the outer portion 111A arranged on the side surface of the rimless tatami mat 1.

Both ends 117 of the tatami mat surface material 11 in the warp direction are bent along a bending line 11C perpendicular to the warp direction and arranged on the side surface of the tatami floor 16 to form both side surfaces of the rimless tatami mat 1 in the warp direction. As shown in FIG. 4, both ends 117 in the warp direction are both ends in the warp direction at the inner portion 111B of both ends 111 in the weft direction, both ends in the warp direction at the boundary portion 115, and both ends in the warp direction at the central portion 113 in the weft direction. It is composed of and. That is, the reactive hot melt adhesive 13A is arranged at both ends in the weft direction at both ends 117 in the warp direction. Further, the thermoplastic hot melt adhesive 13B is arranged at the center in the weft direction at both end portions 117 in the warp direction. A boundary portion adhesive 13C in which the reactive hot melt adhesive 13A and the thermoplastic hot melt adhesive 13B are laminated is arranged at the boundary portion at both end portions 117 in the warp direction. In this way, by arranging the reactive hot melt adhesive 13A at both ends of the warp direction end portions 117 in the weft direction, the peeling of the tatami mat surface 12 and the backing material 14 at both end portions 117 in the warp direction is more reliably suppressed. be able to.

In the present embodiment, the width in the weft direction of the portion of the both end portions 117 in the warp direction in which the reactive hot melt adhesive 13A is arranged at both ends in the weft direction is the width in the weft direction of the inner portion 111B of both end portions 111 in the weft direction. It is the same as W2, but it does not have to be the same. Further, the width of the boundary portion at both end portions 117 in the warp direction in the weft direction is the same as the width W1 in the weft direction of the boundary portion 115 in the present embodiment, but it does not have to be the same.

Further, both ends 117 in the warp direction can be bent relatively easily because the warp yarn, which is a thin twisted yarn, is simply bent along the weft yarn formed by knitting the finely divided yarn. Even when the thermoplastic hot melt adhesive 13B is used, the possibility that the tatami mat surface 12 and the backing material 14 are separated from each other in the warp direction end portions 117 is higher than that in the weft direction end portion 111. Low. Therefore, the thermoplastic hot melt adhesive 13B may be used over the entire 117 ends in the warp direction. On the contrary, the reactive hot melt adhesive 13A can be arranged on the entire surface of both ends 117 in the warp direction.

<Manufacturing method of rimless tatami>
The rimless tatami mat 1 can be manufactured by, for example, the following method.

First, the backing material 14 is lined with the first adhesive 13 on the back surface of the tatami mat surface 12 to obtain the tatami mat surface material 11. The first adhesive 13 may be applied to either the tatami mat surface 12 or the backing material 14, but the case where the first adhesive 13 is applied to the back surface of the tatami mat surface 12 will be described below as an example.

Specifically, the thermoplastic hot melt adhesive 13B is applied to the regions corresponding to the central portion 113 in the weft direction and the boundary portion 115 on the back surface of the original fabric of the tatami mat that constitutes the tatami mat surface 12. For the coating of the thermoplastic hot melt adhesive 13B, for example, a die coater, a hot roll coater provided with a weir according to the coating width, a knife coater, a hot comma coater, a hot comma reverse coater, or the like can be used, and in particular, A die coater can be preferably used. The die coater can easily handle tatami mats of various sizes by adjusting the coating width, adjusting the position of the die coater, and the like. A die coater is also suitable for applying a high-viscosity, moisture-curable adhesive such as a hot-melt adhesive.

Next, the reactive hot melt adhesive 13A is applied to the regions corresponding to the boundary portion 115 and both end portions 111 in the weft direction so that the uncoated portion of the first adhesive 13 does not occur. Since the thermoplastic hot-melt adhesive 13B is first applied to the boundary portion 115, the reactive hot-melt adhesive 13A is further laminated. The reactive hot-melt adhesive 13A can also be applied using the same equipment as the thermoplastic hot-melt adhesive 13B, but different types of adhesives are laminated on both ends of the tatami mat surface 12, particularly the boundary portion 115. From the viewpoint of coating, a die coater is particularly suitable.

When the coating of the first adhesive 13 is completed, the sheet material which is the raw material of the backing material 14 is attached to the back surface of the tatami mat surface 12 to obtain the original fabric of the tatami mat surface material 11. The bonding can be performed by using a method such as roll laminating, continuous pressing (double belt pressing), or lithographic pressing. From the viewpoint of downsizing and simplification of equipment, it is desirable to bond them by roll laminating.

After obtaining the original fabric of the tatami mat surface material 11 by the above-mentioned step, the next step is to manufacture the rimless tatami mat 1. Specifically, first, the cushion material 16B is adhered to the surface of the original fabric of the tatami board 16A using, for example, a rubber adhesive, and cut out to a predetermined size to manufacture the tatami floor 16. After that, it is hollowed out to match the size of the tatami floor 16 and to add a bent portion to the side surface of the tatami floor 16, for example, as shown in the developed view shown in FIG. Then, it is attached to the tatami floor 16 using the second adhesive 15 and the second adhesive 15 is cured to obtain a rimless tatami mat 1.

The end portion of the tatami mat surface material 11 can be bent, for example, by pressing a heated metal plate or the like against the tatami mat surface material 11. For bending both end portions 111 in the weft direction, for example, pressing at 160 ° C. to 200 ° C. for about 60 seconds to 90 seconds is effective. Further, for bending both end portions 117 in the warp direction, for example, pressing at 160 ° C. to 200 ° C. for about 15 seconds to 45 seconds is effective.

(Embodiment 2)
Hereinafter, other embodiments according to the present disclosure will be described in detail. In the description of these embodiments, the same parts as those of the first embodiment are designated by the same reference numerals, and detailed description thereof will be omitted.

FIG. 5 is a view corresponding to FIG. 2 of the borderless tatami mat 1 according to the second embodiment. FIG. 6 is an enlarged view of a portion indicated by reference numeral C in FIG. FIG. 7 is a view corresponding to FIG. 4 of the tatami mat surface material 11 of FIG.

As shown in FIG. 5, the rimless tatami mat 1 according to the present embodiment is a tatami mat of a standing type, and the tatami mat surface material 11 is arranged on a part of the front surface, the side surface and the back surface of the tatami floor 16. Further, the thickness adjusting material 18A and the anti-slip sheet 18B are attached to the back surface of the tatami floor 16 via, for example, a third adhesive 19. The thickness adjusting material 18A is for adjusting the thickness of the rimless tatami mat 1 generated when the tatami mat surface material 11 is partially arranged on the back surface side of the tatami floor 16, and is the same as the thickness of the tatami mat surface material 11. It has a certain thickness. The anti-slip sheet 18B is for preventing slippage when the rimless tatami mat 1 is arranged on the floor surface or the like. As the thickness adjusting material 18A and the anti-slip sheet 18B, for example, a non-woven fabric or the like is used. As the third adhesive 19, the same ones as the first adhesive 13 and the second adhesive 15 can be used. The thickness adjusting material 18A and the anti-slip sheet 18B may be fixed to the tatami floor 16 by a method other than an adhesive.

As shown in FIGS. 6 and 7, in the borderless tatami mat 1 according to the present embodiment, the boundary portion 115 is arranged on the side surface of the borderless tatami mat 1. The both end portions 111 in the weft direction are arranged on the back surface of the rimless tatami mat 1 in the weft direction and the side surfaces in the weft direction. Further, the central portion 113 in the weft direction is arranged on the side surface and the front surface of the rimless tatami mat 1 in the weft direction, the side surface in the warp direction, and the back surface in the warp direction. If both ends 111 in the weft direction are arranged on the back surface of the rimless tatami mat 1, the peeling between the tatami mat surface 12 and the backing material 14 is sufficiently suppressed on the back surface of the rimless tatami mat 1. Therefore, the boundary portion 115 may be arranged on any of the front surface, the side surface, and the back surface of the rimless tatami mat 1.

As shown in FIG. 7, in the tatami mat surface material 11, both end portions 111 in the weft direction are bent perpendicular to the weft direction not only at the bending line 11A but also at the folding line 11B outside the bending line 11A, and the outer portion 111A. Is attached to the back surface of the tatami floor 16. Then, the inner portion 111B is attached to the side surface of the tatami floor 16. Further, both end portions 117 in the warp direction are bent perpendicular to the warp direction at the fold line 11D outside the fold line 11C in addition to the fold line 11C, and are attached to the side surface and the back surface of the tatami floor 16 in the warp direction. Will be done. In the present embodiment, the thermoplastic hot melt adhesive 13B is arranged over the entire surface at both end portions 117 in the warp direction.

The rimless tatami mat 1 according to the present embodiment can be manufactured by the same method as the rimless tatami mat 1 of the first embodiment except for the following procedure. That is, when the tatami surface material 11 is attached to the tatami floor 16 using the second adhesive 15, the tatami surface material 11 is wound around the back surface of the tatami floor 16 and attached. Then, the thickness adjusting material 18A and the anti-slip sheet 18B are adhered to a predetermined position on the back surface of the tatami floor 16 using the third adhesive 19. When a hot melt adhesive is used as the third adhesive 19, it can be adhered by hot pressure adhesion.

(Other embodiments)
The first adhesive 13 may not be arranged over the entire surface of the back surface of the tatami mat surface 12, in other words, the entire surface of the backing material 14, even if there is a part where the first adhesive 13 does not exist. Good.

As the hot melt adhesive as the first adhesive 13, three or more kinds may be used as long as the reactive hot melt adhesive is used at both ends in the weft direction.

Although the preferred embodiments of the present disclosure have been described above, the technical scope of the present disclosure is not limited to the scope described in each of the above embodiments. It is a person skilled in the art that each of the above embodiments is an example, and various modifications are possible for the combination of each component and each processing process, and such modifications also belong to the scope of the present disclosure. Is being understood.

The present disclosure is useful in the field of tatami mat surface materials and rimless tatami mats using the same.

1 Borderless tatami mat 11 tatami mat surface material 12 tatami mat table 13 1st adhesive (adhesive)
14 Liner 13A Reactive Hot Melt Adhesive 13B Thermoplastic Hot Melt Adhesive 13C Boundary Part Adhesive 15 Second Adhesive (Additional Adhesive)
16 Tatami floor 111 Both ends in the weft direction 111A Outer part of both ends in the weft direction 111B Inner part of both ends in the weft direction 115 Boundary part 113 Central part in the weft direction 117 Both ends in the warp direction

Claims (11)

A tatami mat made of Japanese paper twisted into a twisted paper thread
With a backing material attached to the back surface of the tatami mat via an adhesive,
The adhesive arranged at both ends in the weft direction is a reactive hot melt adhesive.
A tatami mat surface material characterized in that the adhesive arranged at the central portion in the weft direction is a thermoplastic hot melt adhesive. In claim 1,
The adhesive is arranged over the entire back surface of the tatami mat surface.
A tatami mat surface material characterized in that the reactive hot melt adhesive and the thermoplastic hot melt adhesive are laminated on the boundary portion between both end portions in the weft direction and the central portion in the weft direction. In claim 2,
A tatami mat surface material characterized in that the reactive hot melt adhesive at the boundary portion is arranged on the backing material side of the thermoplastic hot melt adhesive. In claim 2 or 3,
A tatami mat surface material characterized in that the width of the boundary portion in the weft direction is 3 mm or more and 20 mm or less. In any one of claims 1 to 4,
When the tatami mat is made as a rimless tatami mat by being attached to a tatami floor, both ends in the weft direction are bent perpendicular to the weft direction to form at least one of the side surface and the back surface of the rimless tatami mat. A tatami mat surface material that is characterized by this. In any one of claims 1 to 5,
The paper-making yarn is a tatami mat surface material characterized by being a tubular paper-making yarn. The tatami mat surface material according to any one of claims 1 to 6.
A rimless tatami mat provided with a tatami mat floor attached to the backing material side of the tatami mat surface material via an additional adhesive. In claim 7,
The outer portions of both ends of the tatami mat surface material in the weft direction are arranged on the side surface of the tatami mat floor.
A rimless tatami mat characterized in that at least a part of the inner portions of both ends in the weft direction of the tatami mat surface material is arranged on the surface of the tatami floor. In claim 8.
A rimless tatami mat having a width of 20 mm or less in the weft direction of the inner portions of both ends in the weft direction. In any one of claims 7 to 9,
Both ends of the tatami mat surface material in the warp direction are arranged on the side surface of the tatami mat floor.
A rimless tatami mat characterized in that both ends in the weft direction at both ends in the warp direction of the tatami surface material are provided with a reactive hot melt adhesive. In claim 7,
A rimless tatami mat characterized in that the outer portions of both ends of the tatami mat surface material in the weft direction are arranged on the back surface of the tatami mat floor.

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